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Evaporites and Bauxite: Properties, Distribution, and Formation, Slides of Geology

Information on various evaporites such as halite, soda ash, gypsum, anhydrite, calcite, dolomite, borax, sylvite, and their properties. Additionally, it discusses the distribution, temperature requirements, and crystal systems of these minerals. The document also covers bauxite, its distribution, temperature for rapid dehydration, density, maximum alumina content, and crystal system. Furthermore, it explains the formation of bauxite under specific conditions and compares it with kaolin and feldspar.

Typology: Slides

2012/2013

Uploaded on 07/19/2013

khann
khann 🇮🇳

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Evaporites
Halite NaCl
Soda Ash Na2CO3
(Trona) (Na3H(CO3)
Gypsum CaSO4.2H2O
Anhydrite CaSO4
Calcite CaCO4
Dolomite CaMg(CO3)2
Borax Na2B4O5(OH)4.8H2O
Sylvite KCl
Halite
Halite
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Evaporites

Halite NaCl

Soda Ash Na 2 CO 3

(Trona) (Na 3 H(CO 3 )

Gypsum CaSO 4 .2H 2 O

Anhydrite CaSO 4

Calcite CaCO 4

Dolomite CaMg(CO 3 )^2

Borax Na 2 B 4 O 5 (OH) 4 .8H 2 O

Sylvite KCl

Halite Halite

GypsumGypsum

Trona Trona

TRAVERTINETRAVERTINE

Biogenic (CHALK) Biogenic FOSSILIFEROUS LIMESTONE

Bauxite

KAOLINKAOLIN

(Al(Al 22 SiSi 22 OO 55 (OH)(OH)^44 ))

Acidic conditionAcidic condition

FeldsparFeldspar KaoliniteKaolinite

BauxiteBauxite (Al(Al 22 OO 33 .H.H 22 O)O) AlkalineAlkaline

1. Marine phosphorites

cold, nutrient rich, shallow marine

2. Igneous phosphate

carbonatites

3. Island phosphat (guano)

birds and bat excrements

[Ca 5 (PO 4 , CO 3 ) 3 (F, OH, Cl)]